Now, I had this idea while trying to study ( big surprise ), and I wondered if it's a good idea for a tale. I wanted to write about an "employee" working at SCP Foundation. I still ahven't decide what class should he be, but I imagined him as some sort of intern, or C-Class, someone working with SCP's or an assistant for the doctors.
I am open to suggestions and even plot ideas, as I have writer's block.

Generally, on the site it's expected for people to do their own work when it comes to generating pages, including conceptualization and drafting. Asking others to write the entire plot of a tale for you tends to be seen as lazy.

What do you want to write about? What sort of existing material on the site inspired you to want to write in the first place?

I wanted to write about an "employee" working at SCP Foundation.

We have a lot of slice-of-life tales on the site that focus on what it's like working for the Foundation. Have you read a couple of them to see what's already been done?